I have used in France with very hard to reach and tunnel luminaire both work very well as I expected and they can come on pretty fast but just a breif warm up once it stay on it look pretty good the colour itself is simuair to 41K MH's

The bulb life yeah I am aware it can go 100,000 hours before burn out but the question is the ballast I heard rumors some only last 50K hours but not confirmed.